Carriers for filling insertion in a weaving machine

ABSTRACT

The invention relates to a pair of carriers for filling insertion from a filling supply package positioned outside of the warp shed in a weaving machine, said carriers consisting of an inserting carrier and of a withdrawing carrier, both of which are provided with a thread clamping device or thread end holding means.

United States Sole et a1.

' tent 51 Feb.1,1972

[54] CARRIERS FOR FlLLING HNSERTION 1N A WEAVING MACHINE [72] lnventors:Ramon Sole; Othmar Bruhwller, both of Brugg, Switzerland [73] Assignee:Georg Fischer AG., Aargau,Brugg, Switzerland [22] Filed: Nov. 23, 1970[21] Appl. No.: 91388 [30} Foreign Application Priority Data Nov. 27,1969 Switzerland ..17767/69 [52] U.S.Cl ..139/127 R, 139/122N [51} Int.Cl. ..D03d 47/18 [58] Field of Search 139/122-127 [56] References CitedUNITED STATES PATENTS 3,390,707 7/1968 Scherillo ..l39/122 FOREIGNPATENT S OR APPLICATIONS 716,906 10/1966 Italy ..139/122 482,852 1/1970Switzerland ..l39/122 Primary Examiner-Henry S. J audon Attorney-RodneyC. Southworth 5 ABSTRACT The invention relates to a pair of carriers forfilling insertion from a filling supply package positioned outside ofthe warp shed in a weaving machine, said carriers consisting of aninserting carrier and of a withdrawing carrier, both of which areprovided with a thread clamping device or thread end holding means.

5 Claims, 13 Drawing Figures PATENIEU FEB H972 3.638.686

sum 1 or 5 Fig. 1

INVENTORS Ramon Sok Otfmur Brihwiler BY flw zwf ATTORNEY PATENTEDFEBH912 3.638.686

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INVENTORS Ranon Sok? 1 Othmor Brfihwiler.

ATTORNEY PATENTED EB "9 SHEET '6 [IF 5 Fig. 5a

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INVENTORS Ramon Sol Othmcr B'ijhwiler ATTORNEY CARRIERS FOR FILLINGINSERTION IN A WEAVING MACHINE BACKGROUND OF THE INVENTION Forshuttleless looms with single pick insertion two basic insertion systemsare known and used, in both of which the filling yarn is inserted intothe warp shed by an inserting carrier and a withdrawing carrier enteringthe warp shed from opposite sides, meeting each other in the middle ofthe shed for yarn or pick transfer and thereafter returning to theirbasic position The one system known as loops insertion, is characterizedin that a filling thread leading from a cloth selvage to a yarn supplypackage is caught by an inserting carrier provided with guiding surfacesand is extended or transported in the form of a loop sliding over theguiding surfaces to the middle of the cloth where it is taken over by ortransferred to the meeting withdrawing carrier. Simultaneously with thetransfer of the loop, the filling coming from the last pick andconnected at the cloth selvage is cut at the selvage, whereupon thewithdrawing carrier moving outwards of the shed pulls the cut pick tothe opposite cloth edge. With the other system known as tip insertion,the filling thread leading from one cloth selvage to a yarn supplypackage is caught by an inserting carrier provided with a clampingdevice whereby the filling thread is cut at the cloth selvage no laterthan when the inserting carrier enters the shed so that the free fillingtip is carried ahead into the shed. In the middle of the cloth thefilling tip is transferred to and clamped by the withdrawing carrierwhich entered the shed from the opposite side of the cloth. On thereturn of the withdrawing carrier the filling is, again with its tipahead, pulled out over the other half of the cloth.

Each of these systems has its own field of application within which fulluse can be made of its particular advantages. The loop insertion systemdue to its simple configuration of carriers (no clamping devices) isparticularly suitable for fibrous yarns of fine and medium countsrequiring handling by devices which are self cleaning. A disadvantage ofthe loop insertion system is, however, that course yarns and slub yarnsdo not run well over the guiding surfaces of the carriers or throughtheir tension means.

On the other hand course and slub yarns can easily be inserted with thetip insertion system where the yarn does not have to run over guidingand tensioning surfaces, but is held fast in the carriers. Thedisadvantage of this system is its tendency to choking or jamming of thelinks and/or flexible clamping parts when inserting fibrous yarns whichgive off considerable lint.

However, both systems ideally complement each other and are together ina position to insert a wide range of filling yarn. To use both systemsby way of choice on one and the same loom and with a reasonablechangeover time has so far not been possible because of the fact thattoo many control elements for presenting the thread to the insertingcarrier and also the thread cutting devices had to be exchanged and thatthe inserting carriers for the tip insertion system required a virtuallyvertical presentation of the filling yarn, which is not possible in thesame way with the loop insertion system.

SUMMARY OF THE INVENTION The task of the present invention is to createfilling insertion members for tip insertion that can be used in a simplemanner instead of the filling insertion members for loop insertion,whereby the control elements for loop insertion such as the fillingdepressor e.g., as per Swiss Pat. No. 464,106, and with slightmodification, the multicolor filling control motion e.g., as per SwissPat. No. 465,524, and a filling cutting device e.g., as per copending USPatent application Ser. No. 68,859 filed Sept. 2, 1970 (Inventors: AntonEgloff and Oskar Bernath) can be used unchanged, and wherein only thetiming of thread clamping, depressing and cutting within the insertioncycle have to be reset.

This also supposes that the filling thread can be presented to the newinserting carrier in what is close to a horizontal position, similarlyas for a loop insertion system. In addition a stationary control bar hasto be provided to open the withdrawing carrier. This control bar can befastened by two screws to the tape guide. The changeover from one systemto the other requires only a few changes and adjustments and take afraction ofthe time for a warp change.

The present invention is further characterized in that the insertingcarrier is provided at its head with a warp end separating part which isapproximately parallel to the reed, the upper edge of which has theshape of a rising, concave thread guide cam face and extends into anopen thread groove which is overlapped by a horn, the tip of whichprojects out towards the reed, whereby the clamping point for thefilling yarn is recessed in relation to the thread groove, and in thatthe withdrawing carrier is provided at its side opposite the reed with afront wall approximately parallel to the reed and having a shoulder thatoverlaps the tip of a horn which is provided at a movable clamping partthat cooperates with a horizontal clamping bottom surface extending fromthe front wall towards the reed and to which a thread groove for thefilling yarn release is joined toward the tip of the carrier.

The drawings show by way of example one configuration of the invention,wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view ofa fillingcontrol motion on a shuttleless loom showing the carriers shortly afterthe inserting carrier has caught the filling yarn,

FIG. 2 is a plan view of the same arrangement as in FIG. I, but afterthe transfer of the filling yarn to the withdrawing carrier,

FIG. 3 is a front view of the inserting carrier,

FIG. 4 is a plan view of the inserting carrier of FIG. 3, FIGS. 50, 5b,5c and 5d are front views of the inserting carrier of FIGS. 3 and 4, infour successive phases during the taking of the filling.

FIG. 6 is a front view of the withdrawing carrier which is designed tocooperate with the inserting carrier of FIGS. 3 and FIG. 7 is a planview of the withdrawing carrier of FIG. 6,

FIG. 8 is a plan view illustrating the operation of both carriers atfilling transfer,

FIG. 9 is a vertical section across the left hand tape guide showing theopening mechanism for the withdrawing carrier, and

FIG. 10 is a section across the inserting carrier along the line XX inFIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a plan view showing afilling control motion of a shuttleless loom with single pick insertionby means of an inserting carrier and a withdrawing carrier functioningaccording to the tip insertion system. On a girt l of the weavingmachine (not shown in great detail) is mounted a control housing 2 witha camshaft 6 borne in two bearings 3. This cam shaft 6 is driven bymeans (not shown) synchronously with the movements of the reciprocatingfilling insertion members 4 and is equipped with a plurality of cams 5.

The control movements of the rotating cams 5 are transferred to pushingrods 9, l0, l1 and 12 provided with cam following rollers 7, saidpushing rods being horizontally movable in guides in a bar 13. Thepushing rod 9 is provided with teeth 14 that mesh with a pinion 15 on ashaft 118 that is borne in bearings 16 and 17. This pinion shaft 18operatively supports the filling cutting device which as a whole isidentified by numetal 19. The end 20 of the shaft 18 extending towardsthe cloth allows setting the filling cutting device 19 to the requiredcloth width. The filling cutting device 19 is arranged on the pinionshaft 18 so that its cutter members 21, 22 can move up and down outsidethe warp ends 23 of a ground cloth, i.e., adjacent to the cloth selvage24.

The pushing rods 30, ll act via double levers 26 linked in bearings 27and provided with rollers upon a filling depressor 28, the purpose ofwhich is to bring the filling yarn 29 from an inclined position into amore level or horizontal position to allow the filling yarn to be takenover by an inserting carrier 36 of the filling insertion member 4. Therollers 25 are pressed against the pushing rods 10 and 11, respectively,by traction springs (not shown).

The pushing rod 12 is connected to a rod 33 movable in guides 31 andprovided with a pressor 32, said rod being spring loaded by compressionspring 34 against the pushing rod 12. The presser 32 acts upon a fillingclamp 35 consisting of two flat springs 37 fixed in two studs 36 and ofacounter or backing stud 38.

Furthermore, there are a lay sword 39, a lay 40 with a read 41 and araceway 42 as support for the warp ends 23 and the flexible type tapefilling insertion member 4 running in the tape guide 43.

The filling thread 45 forming the cloth 44 together with the warp ends23 have free ends 46 at the selvage 24. The cutting of the filling yarn29 connected with the last beaten-up pick 47, and passing in a looparound the filling cutting device 19, and being held fast in the threadclamping device 48 of the inserting carrier 3i), takes place when thethread clamping point at the carrier has reached the outermost warp ends23. The filling yarn 29 now leads from the inserting carrier 30 througha filling positioner 50, the filling clamp 35 and a protector shieldwith eyelet 51 to a filling supply package 52 and is inserted with thethread tip 53 which was cut off from the last beaten-up pick as theleading end of the pick.

FIG. 2 shows the same arrangement at a later moment of the fillinginsertion cycle, after the filling tip 53 has been trans ferred from theinserting carrier to the withdrawing carrier. Unlike the otherwiseidentical FIG. 1, this FIG. 2 shows the withdrawing carrier 54 in whichthe filling is held fast by a thread clamp 55, so that the pick is alsopulled out of the shed with its tip or leading end 53 ahead.

FIG. 3, 4 and 10 show the inserting carrier 30. A carrier body 57 firmlyconnected to a steel tape 4 is provided with a backwall 59 facing theread with a cover surface 60 and with a thread clamping device 48mounted at the front, which together form a tunnel shaped hollow space58 for the en trance of the withdrawing carrier. At the head of thecarrier the backwall 59 is formed as a warp separating part 61 with aconcave guiding cam 62 and an adjacent open thread groove 63. Shown inFIG. 3, the open thread groove 63 is overlapped by a horn 64 pointing tothe warp separating part 61 so that any possible loose warp ends 23cannot get into the thread groove 63.

A clamping bottom member 65 is also fastened to the carrier body 57 bymeans of screws 66. Cooperating with the clamping bottom member 65 isthe clamping piece 69 situated above the clamping bottom member, saidclamping piece being freely guided at one end in the hole 67 of thecover surface 60 and at the other end by a stud 68 in a hole of a smalllug 70 fixed to the clamping bottom member 65. Pressed into the clampingbottom member 65 is a stud 71 the upper end of which engaging in a holeof the flat spring 73. Centered in another hole of the flat spring 73 isa ball 75 supported by the clamping piece 69. An adjusting screw 76threaded into the clamping bottom member 65 and positioned between stud71 and ball 75 allows one to set the clamping pressure between clampingbottom member 65 and clamping piece 69, whereby the clamping force istransmitted at one point from the flat spring 73 via ball 75, securingan advantageous clamping contact. The clamping piece 69 is provided witha flat intake cam face 78 meeting the clamping bottom member 65 at itstop surface. The receding back part 81 of the cover surface 60 givesgood access from above to the adjusting screw 76 for resetting purposes,while the screw is still sufficiently covered against contact with loosewarp ends.

FIGS. 5a, 5b, 5c and 5d show front views of the inserting carrier infour phases a to (1 during filling takeover or pickup. FIG. 5a shows theinserting carrier 30 running in toward the filling 29 leading from thecloth selvage 44 to a filling positioner 50. The filling 29 is firstcontacted by the concave guiding cam 62 by which, even if the filling issagging, it is centered until the yarn tension in the filling 29 isincreased by the forward movement of the inserting carrier 30 indirection of the arrow 82, so that the filling is safely guided into thethread in take opening 80, FIG. 4. Here the filling depressor 28 has notyet contacted the filling 29.

Now going on to the next phase in FIG. 5b, the filling depressor 28 hasreached its bottom center position. Thereby the filling 29 is pulleddown and into the open thread groove 63.

In FIG. 5c the filling depressor 28 is on its withdrawing movement. Bythe inclination of the thread groove 63 the filling 29 is guided to thebottom of groove end 84.

FIG. 5d shows the entrance of filling 29 into the intake cam 78, FIG. 3,of the clamping piece 69. By the continuing forward movement of theinserting carrier 30 in the direction of arrow 82, the bottom groove end84 takes a position in relation to the cloth selvage 24 which brings theyarn pan 85 directly in front of the intake cam 78 of the clampingpiece. The yarn part 85 will thereafter enter up to the thread clampingpoint 79. When the tip of the filling is thus held in the clampingdevice of the inserting carrier 30, the cut takes place near the clothselvage 24, however, for simplicity of illustration, the cutter is notshown here.

FIG. 6 is a front view and FIG. 7 a plan view of the withdrawing carrier54. A steel tape 4 is fixed to the carrier body 87 which has in itsU-shaped recess 88, open at the top, a clamping piece 90 pivotablymounted on axis 89, consisting of an opener part 91 and of a clampinglever part 92 with a horn 93. At the place of the tip 95 of the horn 93,the front wall 94, facing away from the reed, of the U-shaped section 88is provided with a shoulder 96 projecting beyond the tip 95 and leadingto the same plane formed by the surface of the horizontal clampingbottom 97 which is mounted under the hook 93 on the inside of the wall94. Adjacent to the clamping bottom 97 there is a cross notch 98 in thefront wall 94 matching exactly with a notch 99 at the lower side of thehorn 93. Front wall 94 and horn 93 extend towards the carrier tip 100 ofthe front wall. The tapered intake section 101 at the bottom of the horn93 together with the clamping bottom 97 form the thread clamping deviceof the withdrawing carrier 54. By depressing the opener part 91 againsta built-in spring 102, the intake section 101 can be lifted off theclamping bottom, whereby the clamping effect is cancelled and a clampedthread runs at once into the notches 98, 99 whereby it is released.

A spring plate 107 having a nose 108 bent toward the carrier tip 100 isfastened to the front wall 94 by means ofa plate and screws 106. Thenose 108 forces the thread end 53 of a filling yarn 29 clamped betweenclamping bottom 97 and horn 93 to take a hair pin shape, which causes anincreased clamping effect and, particularly when using stiff yarn, makesit possible to clamp it securely.

FIG. 8 illustrates the filling transfer from the inserting to thewithdrawing carrier. The filling 29 presented by the inserting carrier30 in an angular configuration 110 formed over the groove end 84 and thethread clamping point 79 is inserted into the withdrawing carrierbetween horn 93 and shoulder 96. On pulling out the withdrawing carrier54 from the inserting carrier 30, the filling yarn 29 runs under thehorn 93, FIG. 7, where it is clamped and pulled out of the threadclamping point 79 of the inserting carrier 30. Of particular importanceis the angle 110 of the presented filling 29 as only this position andcondition guarantees that the tip 95 is covered (seen in the directionof the warp ends) by the front wall 94 or the shoulder 96, and that thefilling is safely inserted without harm to the warp.

FIG. 9 shows a section across the left hand tape guide with the openingmechanism for the withdrawing carrier. When the withdrawing carrier 54leaves the cloth 44, the clamping effect of the taking carrier 54 or theclamping piece 90 upon the filling 29 is to be cancelled to allow thefiling tip to be released by the withdrawing carrier. For this purposean angle shaped bracket 112, onto which a stationary opener cam 114 isclamped by means of screw 113, is mounted on the left hand tape guide 43by means of screws [11. Toward the end position of the withdrawingcarrier, the opener cam 114 presses against the opener part 91 of thewithdrawing carrier 54 to release the filling.

The pair of carriers as heretofore described allows a filling yarninsertion by tip insertion, by simple change of carriers and withoutdoing more than making adjustments of the filling control devices in aloom otherwise equipped and operable for the loop insertion system. Thepossibility of damaging loose warp ends is excluded with both carriersin that the horn 64 of the insertion carrier and the horn 93 of thewithdrawing carrier are overlapped. This overlapping is in turn possibledue to the oblique position of the filling in the carrier.

This disclosure of a preferred embodiment of the invention is to beinterpreted as illustrative of one form the invention may take andmodifications will readily occur to those skilled in the art. Theinvention is not to be restricted except by the scope of the appendedclaims wherein the novel features desired to be protected by LettersPatent are set forth We claim:

I. A pair of carriers for the filling insertion from a supply packagepositioned outside of the warp shed on a weaving machine, said pair ofcarriers consisting of an inserting carrier and a withdrawing carriereach being provided with a thread clamping means, characterized in that,the inserting carrier (30) is provided at its head with a warp endseparating part (61) extending virtually parallel to the reed (41) ofthe weaving machine, the upper edge (62) of the warp separating parthaving the shape of a rising, concave thread guide cam face whichterminates in an open thread groove (63) extending downwardly and whichis overlapped by a horn (64) running out toward the reed, clamping means(48) and (69) having a clamping point (79) for the filling yarn (29)which is setback and substantially on a level with the terminal portionof thread groove (63), and further in that the withdrawing carrier (54)on its side facing away from the reed is provided with a front wall (94)disposed virtually parallel to the reed, a clamping piece cooperatingwith a horizontal clamping bottom member (97), said member (97)extending from the front wall (94) toward the reed, a notch (98) forreleasing the filling positioned adjacent to the carrier tip (100) andthe clamping bottom member (97), said clamping piece (90) havingadjacent the carrier tip a horn (93) and the front wall having ashoulder (96) overlapping the horn (93).

2. A pair of carriers as defined in claim 1, wherein a clamping piece(69) in the inserting carrier (30) extending in the direction of fillinginsertion is loosely guided at both ends.

3. A pair of carriers as defined in claim 2, wherein, the clamping piece(69) is depressed by a flat spring (73) via a ball (75) centered in ahole.

4. A pair of carriers as defined in claim I, wherein, the front wall(94) of the withdrawing carrier is provided with a spring plate (107)with a longitudinally disposed, angularly shaped nose (108).

5. A pair of carriers as defined in claim 4, wherein, the horn (93)together with the clamping bottom (97) form a U-shaped profile.

1. A pair of carriers for the filling insertion from a supply packagepositioned outside of the warp shed on a weaving machine, said pair ofcarriers consisting of an inserting carrier and a withdrawing carriereach being provided with a thread clamping means, characterized in that,the inserting carrier (30) is provided at its head with a warp endseparating part (61) extending virtually parallel to the reed (41) ofthe weaving machine, the upper edge (62) of the warp separating parthaving the shape of a rising, concave thread guide cam face whichterminates in an open thread groove (63) extending downwardly and whichis overlapped by a horn (64) running out toward the reed, clamping means(48) and (69) having a clamping point (79) for the filling yarn (29)which is set back and substantially on a level with the terminal portionof thread groove (63), and further in that the withdrawing carrier (54)on its side facing away from the reed is provided with a front wall (94)disposed virtually parallel to the reed, a clamping piece (90)cooperating with a horizontal clamping bottom member (97), said member(97) extending from the front wall (94) toward the reed, a notch (98)for releasing the filling positioned adjacent to the carrier tip (100)and the clamping bottom Member (97), said clamping piece (90) havingadjacent the carrier tip a horn (93) and the front wall having ashoulder (96) overlapping the horn (93).
 2. A pair of carriers asdefined in claim 1, wherein a clamping piece (69) in the insertingcarrier (30) extending in the direction of filling insertion is looselyguided at both ends.
 3. A pair of carriers as defined in claim 2,wherein, the clamping piece (69) is depressed by a flat spring (73) viaa ball (75) centered in a hole.
 4. A pair of carriers as defined inclaim 1, wherein, the front wall (94) of the withdrawing carrier isprovided with a spring plate (107) with a longitudinally disposed,angularly shaped nose (108).
 5. A pair of carriers as defined in claim4, wherein, the horn (93) together with the clamping bottom (97) form aU-shaped profile.